Pension and Postretirement Plans (Details 7) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jan. 02, 2011
Defined Benefit Plan Disclosure [Line Items]
Net amount	$ (63,625)	$ (73,826)
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Unrecognized actuarial (gain) loss	(105,051)	(112,096)
Unrecognized prior service cost	19,626	21,089
Gross amount	(85,425)	(91,007)
Deferred tax liability (asset)	34,170	36,403
Net amount	(51,255)	(54,604)
Supplemental Executive Retirement Plan (SERP) [Member]
Defined Benefit Plan Disclosure [Line Items]
Unrecognized actuarial (gain) loss	26,385	18,742
Unrecognized prior service cost	245	506
Gross amount	26,630	19,248
Deferred tax liability (asset)	(10,652)	(7,698)
Net amount	15,978	11,550
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Unrecognized actuarial (gain) loss	(15,510)	(17,376)
Unrecognized prior service cost	(31,736)	(37,386)
Gross amount	(47,246)	(54,762)
Deferred tax liability (asset)	18,898	21,905
Net amount	$ (28,348)	$ (32,857)